Oghlike ('onglomerate. — Gr(i)it. 9 
near by in irruptive contact with undoubted Keewatin rocks.* In 
consideration of the above facts — the relation of the Sagauaga 
granite to the Ogishke conglomerate and to the Animike — 
there can no longer be any doubt as to the relati\e ages 
of the two series; the latter is much younger than the 
former, being separated from it liy a great unconformity 
and a long erosion interval. The same is also true of the 
Animike and the Keewatin, no matter what is the age 
of the vertical schists on which the Animike lies at Gunflint 
lake. 
Relation of the Ogislike conglomerate to the Keewatin. This is 
a subject which as yet cannot be regarded as definitely settled. 
Van Hiset considers the two as different formations separated by 
an unconformit}'. But thus far no entirely conclusive evidence 
on this point has l)een found. A. WinchellJ thought that the 
two were one and were not separated by any interruption in 
deposition. And it must be admitted that in many cases the con- 
glomerate is seen to pass into schists and slates which, as 
far as the author knows, have not yet been separated from the 
Keewatin proper either lithologicfdhj or by any structural hreak. 
There is still need of more detniled observations on this point, 
but it can safely be said that all are agreed that the conglomerate 
is more recent than most of the Keewatin, — no matter whether it 
is considered as a part of the Keewatin or as an infolded younger 
series. For the present it is perhaps ])etter to consider the con- 
glomerate as a part of the Keewatin. 
No attempt to parallelize the Ogishke conglomerate with other 
formations in the lake Superior region is here necessary, it being 
the only oV)ject of this article to present briefly the various opin- 
ions on the position of the conglomerate and to state its actual 
relations, so far as is known, to the rocks in its immediate vicin- 
ity. The terms Keewatin and \'ermiliou have been used in the 
sense employed by the Minnesota survey, — i. f. , the former is the 
series of greenstones, graywackes, slates and earthy and semi- 
crystalline schists extending from Vermilion lake to and through 
*More detailed accounts of these contacts will appear in forihcou.ing 
reports of the Canadian and Minnesota surveys. 
tAmer. Jour. Sci., iii, vol. xi.r, pp. 117-137, Feb., 1891. 
JGeol. and Nat. Hist. Survey of Minn., KItli (1887) Ann. Kept., pp. 347, 
348. Proceedings A. A. A. S., XXXVllI, 1889. 
